Hi All,
Sorry for the late reply - I think my situation cannot be replicated easily, since I have a TouchCenter to control the binary sensors as well - therefore an additional relay PCB was required.
Wiring should not be rocket science. If you have spare ‘ports’ available on your Flex PCB, you can wire a binary sensor just like PIR’s are wired up. You could check the Fibaro manual where the wiring is explained in detail. Once you have wired it up let me know - and I can guide you through the installation process.